Strength training frequency...

SO as of today I am at 228 lbs, at 19.4% body fat (6 ft 0.75 in). I therefore have a lean mass of around 184 lbs. This seems like plenty for now, but I still want the benefit of increased fat loss with more muscle. Should I just focus on cardio at the gym and just lift like once a week to maintain my muscle? Or should I continue to build muscle to accelerate fat loss? I don't want to look huge like a body builder, but I'd like to make it down to around 10% BF and have abs. I'm also pretty sure I am still eating insufficient protein for any considerable strength gains and I get far too full to eat as much as I need.

Thanks for the suggestion I'll try it. What % of my 1 set to failure weight should I use if I'm doing nautilus at the gym? Also, will I still mostly have the 1c beans a day I eat (in addition to meat/eggs) go toward building muscle? Still trying to fully understand the interaction the food I eat has on the amount of exercise I put forth.